You can start by looking for websites that offer Japanese manga with translation options. Some popular ones are MangaReader or KissManga. Just make sure they're legal and safe to use.
One way to read manga online legally is by subscribing to well-known and reputable manga subscription services. These services ensure that you have access to a wide range of manga while adhering to legal and copyright regulations. Another option is to check if your local library provides digital access to manga through their online catalog.
You could start by checking out well-known manga apps or websites. Some common ones are Manga Rock or Webtoon. Enter the title 'Keep a Mummy' in the search bar and see if it's available. Also, check for user reviews to ensure a good reading experience.
The key to reading manga online legally and safely is to stick to recognized and legitimate sites. For instance, ComiXology or Webtoon have a decent collection and follow the law. Don't fall for those unknown sites that could cause problems for you.